* listing files to convert to parquet
* write parquet files
* save logs into parquet files
* pass by value
* compact logs into parquet format
* can skip existing files
* refactor
* refactor
* fix compilation
* when no partition found
* refactor
* add untested parquet file read
* rename package
* refactor
* rename files
* remove unused
* add merged log read func
* parquet wants to know the file size
* rewind by time
* pass in stop ts
* add stop ts
* adjust log
* minor
* adjust log
* skip .parquet files when reading message logs
* skip non message files
* Update subscriber_record.go
* send messages
* skip message data with only ts
* skip non log files
* update parquet-go package
* ensure a valid record type
* add new field to a record type
* Update read_parquet_to_log.go
* fix parquet file name generation
* separating reading parquet and logs
* add key field
* add skipped logs
* use in memory cache
* refactor
* refactor
* refactor
* refactor, and change compact log
* refactor
* rename
* refactor
* fix format
* prefix v to version directory
Chris Lu